v3.25.4
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2025
Mar. 02, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Amendment Flag false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Trading Symbol RAPP    
Entity Registrant Name Rapport Therapeutics, Inc.    
Entity Central Index Key 0002012593    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Current Fiscal Year End Date --12-31    
Entity Filer Category Non-accelerated Filer    
Entity Shell Company false    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
ICFR Auditor Attestation Flag false    
Title of 12(b) Security Common Stock, $0.001 par value per share    
Security Exchange Name NASDAQ    
Entity File Number 001-42121    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 88-0724208    
Entity Address, Address Line One 99 High Street    
Entity Address, Address Line Two Suite 2100    
Entity Address, City or Town Boston    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 02110    
City Area Code 857    
Local Phone Number 321-8020    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer Yes    
Document Financial Statement Error Correction [Flag] false    
Entity Public Float     $ 275,840,930
Document Transition Report false    
Entity Common Stock, Shares Outstanding   47,792,943  
Documents Incorporated by Reference [Text Block]

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive proxy statement for its 2025 Annual Meeting of Stockholders to be filed pursuant to Regulation 14A within 120 days of the end of the registrant’s fiscal year ended December 31, 2025 are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent stated herein.

   
Auditor Name PricewaterhouseCoopers LLP    
Auditor Firm ID 238    
Auditor Location Boston, Massachusetts